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Minecraft 1.12.2

ReleaseLegacy 1.x

Minecraft 1.12.2 is a Java Edition full release released on 18 Sept 2017 under the classic 1.x numbering. Mojang lists Java 8 as the required runtime. It speaks network protocol 340.

Released
18 Sept 2017
Requires Java
Java 8+
Protocol version
340
Data version
1343
Version group
1.12
Numbering
Legacy (1.x)
Server software
6 with builds
Position
#349 of 903

Official downloads

Served by Mojang. Verify the checksum before running anything.

FileSizeSHA-1Download
Server jar28.8 MB886945bfb2b9piston-data.mojang.com ↗
Client jar9.7 MB0f275bc1547dpiston-data.mojang.com ↗

The catalogue on 1.12.2

Projects that name 1.12.2 in their own release metadata. Follow any of these to the full filtered list.

What runs on 1.12.2

Builds are counted from each project's own API; declared support comes from the loader's metadata.

Full compatibility
SoftwareLatest buildPublishedChecksumDownload
Legacy Fabric#7228 Jul 2026Not publishedjar ↗
Magma#125 Nov 2024Not publishedjar ↗
Mohist#3804 Dec 2025Not publishedjar ↗
Paper#162020 Dec 20213a2041807f49jar ↗
Spigot#157311 Jul 2018Not publishedjar ↗
Sponge#45228 Jul 2026Not publishedjar ↗
Spigot#1573Not build basedinferredloader
Magma1.12.2-b4c01d2Not build basedinferredloader
Sponge1.12.2-8.0.0-BETA-448Not build basedinferredloader
Mohist1.12.2-2d59d5a4Not build basedinferredloader
Minecraft Forge14.23.5.2859Not build baseddeclaredloader
Legacy Fabric0.19.3Not build basedinferredloader

Everything in 1.12

13 versions in this group.

Filter list
VersionTypeProtocolReleased
1.12.2Release34018 Sept 2017
1.12.2-pre2Pre-release33915 Sept 2017
1.12.2-pre1Pre-release33913 Sept 2017
1.12.1Release3383 Aug 2017
1.12.1-pre1Pre-release3372 Aug 2017
1.12Release3352 Jun 2017
1.12-pre7Pre-release33431 May 2017
1.12-pre6Pre-release33329 May 2017
1.12-pre5Pre-release33219 May 2017
1.12-pre4Pre-release33118 May 2017
1.12-pre3Pre-release33017 May 2017
1.12-pre2Pre-release32911 May 2017
1.12-pre1Pre-release32810 May 2017

Questions about Minecraft 1.12.2

What Java version does Minecraft 1.12.2 require?

Minecraft 1.12.2 requires Java 8 or newer. Mojang publishes this in the version metadata, so an older runtime refuses to start it.

What protocol version does Minecraft 1.12.2 use?

Minecraft 1.12.2 speaks protocol 340. A client and a server can only connect when their protocol numbers match.

Where do I download the Minecraft 1.12.2 server jar?

Mojang hosts it directly. This page links to the official file with its SHA-1 checksum and size, so you can verify the download before you run it. We do not mirror or repackage it.

Which server software supports Minecraft 1.12.2?

Legacy Fabric, Magma, Mohist, Paper, Spigot, Sponge publish builds for 1.12.2. Each one is listed with its build number and checksum.

Go deeper

Metadata from Mojang’s official version manifest. Protocol and data versions from the PrismarineJS minecraft-data project.